Can Somebody help me with code

Can Somebody help me with code

I have developed the HDL code for CPU. Its a little messy but has been working right. When i tried to test the script it is giving error on camparison 3. Can somebody please see my code and help me. I have been developing for straight 3 days and now this error seems to be a great pain to me. I can see the problem but cannot rectify it so if somebody can help me with it please. Looking forward for a volunteer. Reply Asap.